Zabbix

...G...... [ZBXNEXT-1867] fixed logic error in vfs_file_exists() for Unix; fixed symlink following

* commit '5c43966d9823fe2ea0088a0e94db267fecae113c':
  .D........ [ZBXNEXT-1867] fixed ChangeLog entry
  ...G...... [ZBXNEXT-1867] fixed symlink following
  ...G...... [ZBXNEXT-1867] removed redundant return varibale
  ...G...... [ZBXNEXT-1867] fixed logic error in vfs_file_exists() for Unix
  ...G...... [ZBXNEXT-1867] simplified control flow in vfs_file_exists()